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  1. A

    GaN Mosfet --- Arlo?

    what do you think about this type of chip ? in the high voltage , low current can be easier to use this mosfet instead of one IGBT http://eu.mouser.com/ds/2/692/GS66516B%20DS%20Rev%20170321-1107590.pdf
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    GaN or SiC witch semiconductor MOSFET will be the best?

    I'm looking into the spec of some GaN transistor and they look much better than normal MOSFET , for example this http://www.gansystems.com/datasheets/20150904/GS61008T%20DS%20Rev%20150904.pdf transistor is a 100 V 7,4 mOhm and is only 3mm x 6 mm big and is rated for a peak current of 90Ampere ...
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    spot welding nickel strip on aluminium busbar

    Hello, i'm building a batterypack based on LG 18650HE2 2500 mAh 20A IMR. 36s 30p , I have 30 nickel strip in parallel connecting each "s" at the side of the pack I would like to use aluminium busbar to collect the current from the 30 nickel strip ( a bigger aluminium busbar is lighter than an...
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    9S10P outrunner motor , will it work ?

    Hello , somenone have experience in outrunner with 9 slot 10 magnetpole configuration? It will run smooth or il will be unbalanced? From the windings looks unbalanced but with a rethinking the vector from the 3 phases should balance.
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    Copper loss

    Hello, i'm thinking about copper loss on pulsed current. Let's say I have a copper wire able to hold 50A , if I have a pulsed current of 100A for half time and 0A for the other half the same wire will hold or not? (frequency about 50 Hz square wave) Considering the formula I2R looks like the...
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    correlation between torque and magnetic field

    Iron Losses hello , I'm trying to understand how iron losses work in a motor for getting more power out of the motor with better efficiency I was looking to the different type of electrical steel and found out that the name ( M330-35A , M400-35A , M400-50A , M700-100A) is composed for the...
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    Crystalyte HS3540 winding schema

    Hi , I was trying to rewind an HS3540 for better copper fill using smaller wires and more care in the windings lowering as much as possible the not usefull copper ... but .. :x :x :x I FORGOT TO SIGN HOW COPPER WAS !!!!! so now I have an empty stator but I don't know how to rewind it...
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    Phase wiring , mixed or separated -- magnetic interaction?

    Hi everybody , I was playing a little with this tool http://www.powercroco.de/bewicklungsrechner.html for wiring BL motor is fun to see how many different combination exists , more specifically I was playing on a slow turning high multipole motor (40-50 poles) For the windings is better to...
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